Monel 400 Rectangular TubeASTM A554 · Manufacturer, trader & exporter, India
Alloy 400 · UNS N04400
A Monel 400 rectangular tube is rectangular hollow section, made from Monel 400 to ASTM A554 (ornamental) · A312 / A790 for pressure. Rectangular tube is used for frames, supports and architectural work.
- ASTM A554
- ASTM A554 / EN 10219
- EN 10204 3.1 / 3.2
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is a Monel 400 Rectangular Tube?
- What it is
- Rectangular hollow section
- Material
- ASTM A554 (ornamental) · A312 / A790 for pressure
- Dimensions
- ASTM A554 / EN 10219
- Grade
- Monel 400 · UNS N04400
- Best at
- Seawater, hydrofluoric acid and marine service
Monel 400 Rectangular Tube Specification
| Product | Monel 400 Rectangular Tube |
|---|---|
| Material standard | ASTM A554 (ornamental) · A312 / A790 for pressure |
| Dimensional standard | ASTM A554 / EN 10219 |
| Sizes | OD × wall to order |
| Length | Random, double random or cut lengths |
| Testing | PMI (as specified in the PO) · dimensional · NDT and IGC on request |
| Documents | EN 10204 3.1 or 3.2 on request / as specified in the PO |
When to Choose a Rectangular Tube
Rectangular tube is used for frames, supports and architectural work.
- Rectangular hollow section
- Polished or mill finish
- Cut lengths
More on choosing: Rectangular tube guide.
Monel 400 Rectangular Tube: Why 400 for rectangular tubes
Rectangular tube is used for frames, supports and architectural work. In Monel 400, the choice usually comes down to the medium and temperature — the rows here are the points buyers check for this exact combination.
| Why this grade | Nickel-alloy tubulars handle acids, chlorides and heat. Monel 400 is picked for seawater, hydrofluoric acid and marine service. |
|---|---|
| Typical service | Marine — Pump shafts, valves and seawater piping. |
| Welding to carbon steel | A nickel-base filler such as ERNiCr-3 (or ERNiCrMo-3) is used when joining it to carbon steel |
| Matching filler | ERNiCu-7 (AWS A5.14) |
| Sour service | Listed in NACE MR0175 / ISO 15156-3 within its limits — state it on the order |
Monel 400 Rectangular Tube Chemical Composition
Under technical review for TDS.
| Element | Current requirement |
|---|---|
| Nickel (+Co) | As specified |
| Copper | As specified |
| Iron | As specified |
| Manganese | As specified |
| Carbon | As specified |
| Silicon | As specified |
| Sulphur | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification to be verified: ASTM B127 for UNS N04400.
Monel 400 Rectangular Tube Mechanical Properties
Under technical review for TDS.
| Property | Current requirement |
|---|---|
| Tensile strength | As specified |
| Yield strength 0.2% | As specified |
| Elongation | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification and condition to be verified: ASTM B127 for UNS N04400 — Annealed plate.
Full chemistry, properties and equivalents are on the Monel 400 grade page.
Standards on this page
Monel 400 Rectangular Tube — questions buyers ask
Are rectangular tubes structural?
In carbon steel they follow EN 10219 / 10210 for structures; stainless versions are mostly ornamental to ASTM A554.
Can Monel 400 rectangular tubes be welded to carbon steel?
Yes — a nickel-base filler such as ERNiCr-3 (or ERNiCrMo-3) is used when joining it to carbon steel.
Which standard covers Monel 400 rectangular tubes?
The material is ASTM A554 (ornamental) · A312 / A790 for pressure; dimensions follow ASTM A554 / EN 10219. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a Monel 400 rectangular tube?
The alloy price, the size and dimensions, quantity, and the testing and documents required. Send your list and we quote the same working day.
What documents do you supply?
EN 10204 3.1 or 3.2 certificates available on request / as specified in the PO; dimensional reports as required. PMI can be arranged depending on product and requirements, as specified in the PO.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026